Modified headrest of a chair

ABSTRACT

The present invention has a back supporting module, a front headrest module and an anchor plate. The back supporting module has a positioning base, a moveable base, and a positioning cover. An insertion recess is formed in a top end of the positioning base. The moveable base is mounted in the insertion recess of the positioning base. The moveable base can be moved along the positioning cover. The front headrest module has a linking plate mounted in the moveable base and a headrest board. The anchor plate is mounted on a front surface of the linking plate and is securely connected to the moveable base. The headrest board is connected securely to the linking plate. When moving the headrest board, the level position and height of the moveable base can be adjusted.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a modified headrest of a chair, especially a headrest mounted on a top end of a chair backrest for supporting the head of a user.

2. Description of the Prior Arts

A conventional chair is made of a cushion module, a backrest module and a foot base. The backrest module is mounted on the cushion module and the foot base is mounted under the cushion module. When a user sits on the cushion module, the back of the user can be supported by the backrest module. However, the conventional chair does not have a device mounted on a top end of the backrest module for supporting the head of the user. After remaining seated for a period, the user feels tired on their head and neck.

For overcoming the drawback, a conventional headrest is mounted on the backrest module. When sitting on the seat of the chair, the user's back can be supported by the backrest module and the user's head can lean on the conventional headrest to relax the head and neck of the user. Furthermore, another conventional headrest is movably mounted on the backrest module with an adjusting structure for adjusting the height of the conventional headrest. So the conventional chair can be used for users with different body shapes.

But the conventional headrest with an adjusting function cannot meet the demands of users with different body shapes. Therefore, the conventional headrest with an adjusting function still cannot completely meet the demands of users with different body shapes. Especially, the sitting habits differ from user to user, and the supporting effect of the conventional headrest will be limited.

To overcome the shortcomings, the present invention provides a modified headrest of a chair to mitigate or obviate the aforementioned problems.

SUMMARY OF THE INVENTION

The main objective of the present invention is to provide a modified headrest of a chair that has a multi-function adjustment to adjust the height and the angle of the headrest, so that the present invention can meet more requirements from different users.

A modified headrest of a chair comprises a back supporting module, a front headrest module and an anchor plate. The back supporting module has a positioning base, a moveable base, and a positioning cover. An insertion recess is formed in a top end of the positioning base. The moveable base is mounted in the insertion recess and the positioning cover is securely mounted on a back end of the positioning base. The moveable base can be moved along the positioning cover. The front headrest module has a headrest board and a linking plate. The linking plate is mounted in the moveable base. The anchor plate is mounted on a front surface of the linking plate and is securely connected to the moveable base. The headrest board is curved and is connected securely to the linking plate.

Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a modified headrest of a chair in accordance with the present invention, shown mounted on a top of a chair;

FIG. 2 is an enlarged front perspective view of the modified headrest in FIG. 1;

FIG. 3 is an enlarged rear perspective view of the modified headrest in FIG. 1;

FIG. 4 is a front exploded perspective view of the modified headrest in FIG. 2;

FIG. 5 is a rear exploded perspective view of the modified headrest in FIG. 3;

FIG. 6 is a partial exploded perspective view of the modified headrest in FIG. 4;

FIG. 7 is a front side view of an actuating sheet of the modified headrest FIG. 1;

FIG. 8 is a rear side view of a positioning cover of the modified headrest FIG. 1; and

FIG. 9 is an operational front side view of an actuating sheet and the positioning cover of the modified headrest FIG. 8.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to FIGS. 1 to 3, a modified headrest of a chair in accordance with the present invention has a back supporting module 10 and a front headrest module 20. The back supporting module 10 is mounted on a top of a chair, and the front headrest module 20 is connected to the supporting module 10 for supporting a user's head.

With reference to FIGS. 4 to 6, the back supporting module 10 has a positioning base 11, a moveable base 12, an actuating sheet 13 and a positioning cover 14. The positioning base 11 is an inclined frame body and has multiple supporting rods 111, an insertion recess 12, an opening portion 113, a space 114, and multiple fastening blocks 115. The supporting rods 111 extend on a bottom end of the positioning base 11 and are mounted in the top end of the chair. The insertion recess 112 is formed in a top end of the positioning base 11. The opening portion 113 is formed in a front side of the positioning base 11. The space 114 formed in the positioning base 11 and communicates with the insertion recess 112 and the opening portion 113, and the multiple fastening blocks 115 are mounted between the opening portion 113 and an inner wall of the positioning base 11.

The moveable base 12 is a plate, is mounted in the insertion recess 112 of the positioning base 11 and is located in the space 114. The moveable base 12 has two linking rods 121 respectively formed on two opposite sides of the moveable base 12 at a top side of the moveable base 12, two protrusions 122 respectively mounted on the linking rods 121, multiple lock holes 123 mounted through the protrusions 122 at intervals, a positioning groove 124 formed in a front surface of the moveable base 12, multiple positioning pins 125 mounted in the positioning groove 124, and a straight groove 126 formed in the front surface and communicating with the positioning groove 124.

With reference to FIGS. 6 and 7, the actuating sheet 13 is mounted in the positioning groove 124 of the moveable base 12, is made of soft materials, and has multiple securing holes 131, a linking arm 132, and a fastening pin 133. The securing holes 131 are formed through the actuating sheet 13 and respectively disposed around the positioning pins 125. The linking arm 132 extends downwardly from an outer edge of the actuating sheet 13 and is mounted in the straight groove 126, and the fastening pin 133 is formed on a bottom end of the linking arm 132 and mounted in the straight groove 126.

With reference to FIGS. 6 to 8, the positioning cover 14 is connected to the positioning base 11 and has an area equal to an area of the opening portion 113. The positioning cover 14 has multiple securing holes 141, multiple screwing units, a limit groove 142, and a convex portion 143. The securing holes 141 are formed on edges of the positioning cover 14 corresponding to a position of the fastening blocks 115. The screwing units are mounted through the securing holes 141 and locked in the fastening blocks 115. The limit groove 142 is formed on a center of the positioning cover 14 and faces the positioning groove 124 of the moveable base 12, and the convex portion 143 is formed on and protrudes from the limit groove 142 of the positioning cover 14 to form a curved orbit between the convex portion 143 and the limit groove 142. The curved orbit has a first arc groove 144 and a second arc groove 145 formed in the convex portion 143 at an interval and communicating with the limit groove 142. When the actuating sheet 13 is mounted into the positioning groove 124 of the moveable base 12 to enable the positioning pins 125 to mount in the securing holes 131, the positioning cover 14 can be pressed to mount in the opening portion 113 to enable the fastening block 115 to be located in the securing hole 141. With reference to FIG. 8, the fastening pin 133 of the actuating sheet 13 is mounted in the curved orbit between the convex portion 143 and the limit groove 142.

With reference to FIGS. 4 to 6, the front headrest module 20 has a headrest board 21 and a linking plate 22. The headrest board 21 is a curved sheet and has a repositioning space 211, two first grooves 212, and multiple repositioning rods. The reposition space 211 is formed in a front surface of the headrest board 21 for accommodating a cushion mounted in the repositioning space 211. The two first grooves 212 are vertical and formed through the headrest board 21 respectively in two sides of the repositioning space 211. The multiple repositioning rods 213 are formed on and protrude from a back surface of the headrest board 21, and each repositioning rod 213 has a screwing hole. The linking plate 22 is connected to the headrest board 21, abuts the linking rods 121 of the moveable base 12, and has two second grooves 221 formed through the linking plate 22. The second grooves 221 correspond to the protrusions 122 of the moveable base 12. Two toothed portions 222 are formed on a front surface of the linking plate 22 and between the second grooves 221, and multiple through holes 223 are formed through the headrest board 21 and corresponding to the repositioning rods 213 of the headrest board 21. Then, fasteners can be mounted through the through holes 223 to connect the linking plate 22 securely with the headrest board 21 via the screwing holes 213.

The modified headrest of a chair of the present invention further has an anchor plate 30 mounted on the linking plate 22 and connecting to the moveable base 12, and the anchor plate 30 has multiple anchor holes 31 and two engaging teeth 32. The anchor holes 31 are formed through two opposite sides of the anchor plate 30 and corresponding to the lock holes 123, and multiple screwing units are mounted through the anchor holes 31 and locked in the lock holes 123. The engaging teeth 32 are formed on the two sides of the anchor plate 30 next to the inner locations of the anchor holes 31 and engage the toothed portions 222 of the linking plate 22. When assembling, the linking plate 22 is mounted on the front side of the positioning base 11, and the protrusions 122 are respectively mounted into the second grooves 221. The anchor plate 30 is mounted on the front side of the linking plate 22 by mounting some locking components through the anchor holes 31 and being mounted in the lock holes 123. The engaging teeth 32 respectively engage the toothed portions 222, such that the linking plate 22 is mounted on the headrest board 21 to enable the repositioning rods 213 to be mounted in the through holes 223 and locked by the fasteners.

With reference to FIGS. 3 to 5, the modified headrest of a chair of the present invention has a supporting cushion 40 mounted on the front surface of the headrest board 21 and is a curved plate corresponding to the headrest board 21. The supporting cushion 40 has two fixing holes 41 and two guiding blocks 42. The fixing holes 41 are formed through the supporting cushion 40 at two sides of the supporting cushion 40 and are respectively corresponding to the first grooves 212. The guiding blocks 42 are mounted on the front surface of the headrest board 21 and face the first grooves 212. Each guiding block 42 has a lock bore 421 formed on a front side of the guiding block 42 and an arc portion 422 formed on a back side of the guiding block 42. Then, lock components are mounted through the fixing holes 41 and the first grooves 212 and are locked in the lock bores 421 of the guiding blocks 42. Accordingly, the supporting cushion 40 can be moved vertically relative to the headrest board 21 along the first grooves 212. Because of the adjusting function of the supporting cushion 40, the position of the supporting cushion 40 relative to the headrest board 21 can be adjusted by users to fit the suitable body shapes or postures of different users, and the head of the user can be leaned on the supporting cushion 40.

The present invention has two adjusting functions, one is to adjust the angle of the headrest board 21 and the headrest board 21 is not locked by the lock components. With reference to FIGS. 2 and 4, when the headrest board 21 is pulled vertically, the linking plate 22 moves vertically as well, and the toothed portions 222 of the linking portion 22 are moving and engage the corresponding engaging teeth 32.

The other adjusting function is to adjust the height of the headrest board 21. The moveable base 12 is movably mounted in the positioning base 11. When the headrest board 21 is pulled obliquely, the linking plate 22, the anchor plate 30 and the moveable base 12 are moved as well. With reference to FIGS. 8 and 9, the actuating is driven by the external force, and the fastening pin 133 is moved along the curve orbit between the limit groove 142 and the convex portion 143. The fastening pin 133 is located at a stationary position when engaging the first arc groove 144 or the second arc groove 145. When the user wants to readjust the height of the moveable base 12, the fastening pin 133 is continuously moved upwardly to the top position of the curved orbit, and then the fastening pin 133 can be moved downward to the bottom position along the curved orbit. So the position of the moveable base 12 is changed, and the level position of the headrest board 21 is changed as well.

The present invention has two adjustments of changing height and level position of the headrest board 21, so users could adjust the headrest board to meet the requirements of different body shapes, thereby providing an improved comfort headrest to the users.

Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. A modified headrest of a chair comprising: a back supporting module having a positioning base having an insertion recess formed in a top end of the positioning base; a moveable base mounted in the insertion recess; and a positioning cover securely mounted on a back end of the positioning base, the moveable base being moveable along the positioning cover; a front headrest module having a headrest board being curved; and a linking plate mounted on and connected to the headrest board, and abutting the moveable base; and an anchor plate mounted on a front surface of the linking plate and securely connected to the moveable base.
 2. The modified headrest of a chair as claimed in claim 1, wherein the back supporting module has an actuating sheet mounted in the moveable base; the moveable base is a plate and is mounted in the insertion recess of the positioning base and has a positioning groove formed in a front surface of the moveable base; the actuating sheet of the back supporting module is made of soft materials, is mounted in the positioning groove, and has a linking arm extending downwardly from an outer edge of the actuating sheet; and a fastening pin formed on a bottom end of the linking arm; the positioning cover is connected to the positioning base and has a limit groove formed on a center of the positioning cover and facing the positioning groove of the moveable base; a convex portion formed on and protruding from the limit groove of the positioning cover, and a curved orbit formed between the convex portion and the limit groove; a first arc groove formed in the convex portion; and a second arc groove formed in the convex portion and communicating with the curved orbit.
 3. The modified headrest of a chair as claimed in claim 2, wherein the moveable base has multiple positioning pins mounted in the positioning groove; the actuating sheet has multiple securing holes formed through the actuating sheet and respectively disposed around the positioning pins.
 4. The modified headrest of a chair as claimed in claim 2, wherein the positioning base has an opening formed in a front side of the positioning base; a space formed in the positioning base and communicating with the insertion recess and the opening; and multiple fastening blocks mounted between the opening and an inner wall of the positioning base; and the positioning cover has multiple securing holes formed on edges of the positioning cover and corresponding to positions of the fastening blocks.
 5. The modified headrest of a chair as claimed in claim 1, wherein the moveable base has two linking rods formed on two opposite sides of the moveable base at a top side of the moveable base; and two protrusions respectively mounted on the linking rods; the linking plate has two second grooves formed through the linking plate; and two toothed portions formed on the front surface of the linking plate and located on inner sides of the second grooves; and the modified headrest has an anchor plate mounted on the linking plate and connecting to the moveable base, and the anchor plate has two engaging teeth formed on two opposite sides of the anchor plate and engaging the toothed portions of the linking plate.
 6. The modified headrest of a chair as claimed in claim 2, wherein the moveable base has two linking rods formed on two opposite sides of the moveable base at a top side of the moveable base; and two protrusions respectively mounted on the linking rods; the linking plate has two second grooves formed through the linking plate; and two toothed portions formed on the front surface of the linking plate and located on inner sides of the second grooves; and the modified headrest has an anchor plate mounted on the linking plate and connecting to the moveable base, and the anchor plate has two engaging teeth formed on two opposite sides of the anchor plate and engaging the toothed portions of the linking plate.
 7. The modified headrest of a chair as claimed in claim 3, wherein the moveable base has two linking rods formed on two opposite sides of the moveable base at a top side of the moveable base; and two protrusions respectively mounted on the linking rods; the linking plate has two second grooves formed through the linking plate; and two toothed portions formed on the front surface of the linking plate and located on inner sides of the second grooves; and the modified headrest has an anchor plate mounted on the linking plate and connecting to the moveable base, the anchor plate has two engaging teeth formed on two opposite sides of the anchor plate and engaging the toothed portions of the linking plate.
 8. The modified headrest of a chair as claimed in claim 4, wherein the moveable base has two linking rods formed on two opposite sides of the moveable base at a top side of the moveable base; and two protrusions respectively mounted on the linking rods; the linking plate has two second grooves formed through the linking plate; and two toothed portions formed on the front surface of the linking plate and located on inner sides of the second grooves; and the modified headrest has an anchor plate mounted on the linking plate and connecting to the moveable base, and the anchor plate has two engaging teeth formed on two opposite sides of the anchor plate and engaging the toothed portions of the linking plate.
 9. The modified headrest of a chair as claimed in claim 5, wherein the headrest board has multiple repositioning rods formed on a back surface of the headrest board; and the linking plate has multiple through holes formed through the headrest board and corresponding to the repositioning rods of the headrest board.
 10. The modified headrest of a chair as claimed in claim 6, wherein the headrest board has multiple repositioning rods formed on a back surface of the headrest board; and the linking plate has multiple through holes formed through the headrest board and corresponding to the repositioning rods of the headrest board.
 11. The modified headrest of a chair as claimed in claim 7, wherein the headrest board has multiple repositioning rods formed on a back surface of the headrest board; and the linking plate has multiple through holes formed through the headrest board and corresponding to the repositioning rods of the headrest board.
 12. The modified headrest of a chair as claimed in claim 8, wherein the headrest board has multiple repositioning rods formed on a back surface of the headrest board; and the linking plate has multiple through holes formed through the headrest board and corresponding to the repositioning rods of the headrest board.
 13. The modified headrest of a chair as claimed in claim 1, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on a front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks; and two fixing holes formed through two sides of the supporting cushion.
 14. The modified headrest of a chair as claimed in claim 2, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on the front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks; and two fixing holes formed through two sides of the supporting cushion.
 15. The modified headrest of a chair as claimed in claim 3, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on the front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks.
 16. The modified headrest of a chair as claimed in claim 4, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on the front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks; and two fixing holes formed through two sides of the supporting cushion.
 17. The modified headrest of a chair as claimed in claim 5, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on the front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks; and two fixing holes formed through two sides of the supporting cushion.
 18. The modified headrest of a chair as claimed in claim 6, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on the front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks; and two fixing holes formed through two sides of the supporting cushion.
 19. The modified headrest of a chair as claimed in claim 7, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on the front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks; and two fixing holes formed through two sides of the supporting cushion.
 20. The modified headrest of a chair as claimed in claim 8, wherein the headrest board has a reposition space formed in a front surface of the headrest board; two first grooves formed through two sides on the repositioning space and being vertical; and the modified headrest has a supporting cushion mounted on the front surface of the headrest board, the supporting cushion has two guiding blocks mounted on a back surface of the headrest board and facing the first grooves, wherein lock components are mounted through the fixing holes and the first grooves and are locked in the guiding blocks; and two fixing holes formed through two sides of the supporting cushion. 